High-pressure pipeline systems often face problems such as bulging, deformation, or leakage when using ordinary rubber expansion joints. To meet the customer’s demanding working conditions, we customized a special length wrapped double sphere rubber expansion joint and carried out a 1.5 times pressure test on-site with 90kg pressure holding successfully completed.
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The customized wrapped double sphere rubber expansion joint was designed for 6MPa working pressure and reinforced with high-strength winding technology. During the on-site hydrostatic pressure test, the product successfully passed the 1.5 times pressure inspection with no leakage, deformation, or structural damage.
Reliable product quality comes from strict pressure testing and rich manufacturing experience.
Why Are Wrapped Rubber Expansion Joints Better for High Pressure Systems?
Standard rubber expansion joints may fail under high-pressure conditions due to excessive internal stress, while wrapped reinforcement structures can significantly improve pressure resistance.
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Wrapped rubber expansion joints use reinforced tire cord fabric and external winding technology to greatly enhance pressure-bearing capacity, making them suitable for pumps, hydraulic systems, chemical pipelines, and high-rise water supply systems.
This customer-required product adopted a double sphere structure, which provides larger movement compensation and better vibration absorption performance. For the special installation length requirement, we optimized the mold and structural design to ensure both flexibility and high-pressure resistance. Compared with standard single sphere expansion joints, double sphere rubber expansion joints provide better axial, lateral, and angular movement compensation.
How Was the 6MPa Pressure Test Performed?
One of the most common customer questions is: “How much pressure can the product actually withstand?”
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The wrapped double sphere rubber expansion joint was designed for 6MPa working pressure and tested at 1.5 times the rated pressure. During the on-site pressure holding test at 90kg, the product showed no leakage, no bulging, and no abnormal deformation.
During testing, professional hydraulic equipment was used to gradually increase the pressure while technicians continuously monitored the flange connections, rubber body, and reinforcement layers. After long-term pressure holding, the expansion joint maintained excellent elasticity and structural stability.
Strict pressure testing not only verifies product safety but also helps customers reduce maintenance risks during long-term operation. High-pressure rubber expansion joints are widely used in petroleum, chemical plants, fire protection systems, and industrial water supply projects.
What Are the Advantages of Double Sphere Rubber Expansion Joints?
Many engineering projects compare double sphere and single sphere expansion joints before purchasing.
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Compared with single sphere models, double sphere rubber expansion joints provide larger movement compensation, better vibration isolation, and improved noise reduction performance.
The double sphere structure effectively absorbs vibration and water hammer impact caused by pump startup and shutdown. Combined with wrapped reinforcement technology, the product offers stronger anti-burst performance under high-pressure conditions.
In addition, we support custom production based on customer drawings, flange standards, pressure ratings, and installation lengths. Different rubber materials such as EPDM, NBR, and NR are available according to medium and temperature requirements.
How to Choose the Right High Pressure Rubber Expansion Joint?
Different working environments require different expansion joint designs. Improper selection may lead to frequent replacement or pipeline failure.
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When selecting a high-pressure rubber expansion joint, key factors include working pressure, medium type, flange standard, installation length, and temperature conditions.
For chemical media, corrosion-resistant rubber materials are recommended, while hydraulic systems usually require stronger pressure resistance. For high-pressure applications, wrapped rubber expansion joints with control units or limit rods are highly recommended for additional safety.
With more than 30 years of manufacturing experience, we provide professional selection solutions, non-standard customization, and pressure testing services according to actual working conditions.
Why Are More Customers Choosing Customized Wrapped Rubber Expansion Joints?
Modern industrial systems often require customized solutions because standard products cannot fully meet complex installation environments.
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Customized wrapped rubber expansion joints can be optimized according to actual pipeline conditions, including pressure, length, flange drilling standards, and rubber materials.
This customized project was specially developed for high-pressure applications. Through reinforced winding technology and strict pressure testing, the product fully met the customer’s on-site requirements. We not only manufacture products but also provide vibration isolation and pipeline solution support.
Welcome to send drawings, specifications, or working conditions for professional recommendations.
Contact Us
Shanghai Songjiang Vibration Absorber Co., Ltd.
Songjiangflex
Email: [email protected]
Website: Songjiangflex Official Website
Strict pressure testing ensures safer and more reliable operation for high-pressure pipeline systems.
